How to Programmatically Set Maxlength in Android Textview

Android:: Set max-length of EditText programmatically with other InputFilter

Just try this way

InputFilter

InputFilter filter = new InputFilter() {
        @Override
        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
            for (int i = start; i < end; ++i)
            {
                if (!Pattern.compile("[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890]*").matcher(String.valueOf(source.charAt(i))).matches())
                {
                    return "";
                }
            }

            return null;
        }
    };

How to apply

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        EditText edt =(EditText)findViewById(R.id.edt) ;

        edt.setFilters(new InputFilter[]{filter,new InputFilter.LengthFilter(10)});

    }

How to programmatically set maxLength in Android TextView?

Should be something like that. but never used it for textview, only edittext :

TextView tv = new TextView(this);
int maxLength = 10;
InputFilter[] fArray = new InputFilter[1];
fArray[0] = new InputFilter.LengthFilter(maxLength);
tv.setFilters(fArray);

Android:: Set max-length of EditText programmatically with other InputFilter

Just try this way

InputFilter

InputFilter filter = new InputFilter() {
        @Override
        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
            for (int i = start; i < end; ++i)
            {
                if (!Pattern.compile("[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890]*").matcher(String.valueOf(source.charAt(i))).matches())
                {
                    return "";
                }
            }

            return null;
        }
    };

How to apply

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        EditText edt =(EditText)findViewById(R.id.edt) ;

        edt.setFilters(new InputFilter[]{filter,new InputFilter.LengthFilter(10)});

    }

Set max length for EditText

public void setEditTextMaxLength(EditText editText, int length) {
      InputFilter[] FilterArray = new InputFilter[1];
      FilterArray[0] = new InputFilter.LengthFilter(length);
      editText.setFilters(FilterArray);
  }

EditText : set number of characters programmatically

You can Use InputFilter for restricting the number of characters in EditView programmatically as:

InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(10);
your_edittext.setFilters(FilterArray);

for more help you can see this tutorial for restricting number of characters in EditView:

http://www.tutorialforandroid.com/2009/02/maxlength-in-edittext-using-codes.html

What's the best way to limit text length of EditText in Android

Documentation

Example

android:maxLength="10"

How to Get EditText maxLength setting in code

Only limited parameters have their getters, so I don't think you can read it .

So write length (Say 12) in values folder and use it in xml layout and arrayAdapter .
Now its not hard-coded .

1)Create integer.xml in values *

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <item type="integer" name="max_length">12</item>
</resources>

2)In layout

<TextView  android:id="@+id/tv"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content"
    android:maxLength="@integer/max_length"
    />

3) in ArrayAdapter :

int maxLength = getResources().getInteger(R.integer.max_length);

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